I have a date column thats a string and a separate time column thats a string I want to combine these into one column but can't get it to work.   When I use this statement with hard coded values it works but when I plug in field names I just get null.   from_unixtime(unix_timestamp('08-22-2022 15:25:42.23' ,'MM/dd/yyyy HH:mm:ss'), 'yyyy-MM-dd HH:mm:ss')    however this doesn't work: ,from_unixtime(unix_timestamp(concat(cl_date , ' ', cl_time) , 'MM/dd/yyyy HH:mm:ss'), 'yyyy-MM-dd HH:mm:ss') f   Should I not use concat? ... View more